The ability affects each spell that’s not an artifact spell, including your own.

3/1/2010

The ability affects the total cost of each nonartifact spell, but it doesn’t change that spell’s mana cost or converted mana cost. The extra mana also doesn’t change how many times you kicked the spell or what the value of X is (if applicable).

3/1/2010

When determining a spell’s total cost, effects that increase the cost are applied before effects that reduce the cost.